Fix convert_int_to_float in compact_incomplete V1 library API method

[vasil-pashov]

Reference Issues/PRs

What does this implement or fix?

This fixes the behavior of convert_int_to_float exposed via the V1 Library API's compact_incomplete method.

Convert int to float will change the type of all integer columns (both signed and unsigned) to float64. In contrast to dynamic schema conversion this will static cast the values of all segments to float64 prior writing. This functionality was broken when we made the stricter type checks for staged segments.

Additional bugfix was added for dynamic schema. Dynamic schema has a different code path as it calls merge descriptors when it collects all incomplete segments thus the option was not properly applied even in arcticc.

There are two main points:

• columns_match was changed to take convert int to float as a parameter
• merge_descriptors was changed to take convert int to float as a parameter

Any other comments?

Checklist

Checklist for code changes...

• Have you updated the relevant docstrings, documentation and copyright notice?
• Is this contribution tested against all ArcticDB's features?
• Do all exceptions introduced raise appropriate error messages?
• Are API changes highlighted in the PR description?
• Is the PR labelled as enhancement or bug so it appears in autogenerated release notes?